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Self-Diffusion of Phosphonium Bis(Salicylato)Borate Ionic Liquid in Pores of Vycor Porous Glass
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-6810-1882
Kazan (Volga Region) Federal University, Kazan.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-3652-7798
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
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2016 (English)In: Microporous and Mesoporous Materials, ISSN 1387-1811, E-ISSN 1873-3093, Vol. 230, p. 128-134Article in journal (Refereed) Published
Abstract [en]

1H NMR pulsed field gradient was used to study self-diffusion of a phosphonium bis(salicylato)borate ionic liquid ([P6,6,6,14][BScB]) in the pores of Vycor porous glass at 296 K. Confinement in pores increases diffusion coefficients of the ions by a factor of 35. However, some [P6,6,6,14][BScB] ions demonstrated apparent diffusion coefficients much lower than their mean values, which may be due to partially restricted diffusion of the ions. We suggest that this fraction corresponds to areas where ions are confined by pore ‘necks’ (micropores) and empty voids. Heating of the ionic liquid / Vycor system at 330 K led to a change in the diffusivity of the ions, because of their redistribution in the pores. The size of the bounded regions is on the order of 1 µm, as estimated from the dependence of the ion diffusivity on the diffusion time.

Place, publisher, year, edition, pages
2016. Vol. 230, p. 128-134
Keywords [en]
Ionic liquid, diffusion, porous structure, Chemistry - Physical chemistry
Keywords [sv]
Kemi - Fysikalisk kemi
National Category
Physical Chemistry
Research subject
Chemistry of Interfaces; Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-4613DOI: 10.1016/j.micromeso.2016.04.044ISI: 000378661100015Scopus ID: 2-s2.0-84968542987Local ID: 29657a03-d69a-499b-941f-b7995f1efb77OAI: oai:DiVA.org:ltu-4613DiVA, id: diva2:977487
Note

Validerad; 2016; Nivå 2; 20160508 (andfil)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Filippov, AndreiShah, Faiz UllahGlavatskikh, SergeiAntzutkin, Oleg

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